GHSA-mmqv-m45h-q2hp

Sandbox Breakout / Arbitrary Code Execution in localeval

Published 4 Sep 2020Modified 16 Jan 2026

In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

No source gives a CVSS score.

Trivy's own label is CRITICAL. Rated critical by GHSA.

Description

All versions of `localeval` are vulnerable to Sandbox Escape leading to Remote Code Execution. The package fails to restrict access to the main context through `constructor.constructor`. This may allow attackers to execute arbitrary code in the system. Evaluating the payload ``` constructor.constructor("return process.env")() ``` returns the contents of `process.env`. ## Recommendation No fix is currently available. Consider using an alternative package until a fix is made available.

Affected packages and fixed versions

Source	Package	Fixed in
npm::GitHub Security Advisory npm	localeval	15.3.0

References

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